<div class="container">
  <h1>Blur word Animation</h1>
</div>

<style>
  @import url(https://fonts.googleapis.com/css?family=Righteous);

  * {
    box-sizing: border-box;
  }

  html,
  body {
    height: 100%;
    width: 100%;
    background-color: black;
  }

  .container {
    width: 100%;
    height: 100%;
    position: relative;
    padding: 2em;
    filter: contrast(20);
    background-color: black;
    overflow: hidden;
  }

  h1 {
    font-family: Righteous;
    color: white;
    font-size: 4rem;
    text-transform: uppercase;
    line-height: 1;
    animation: letterspacing 5s infinite alternate ease-in-out;
    display: block;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate3d(-50%, -50%, 0);
    letter-spacing: -2.2rem;
  }

  @keyframes letterspacing {
    0% {
      letter-spacing: -2.2rem;
      filter: blur(.3rem);
    }

    50% {
      filter: blur(.5rem);
    }

    100% {
      letter-spacing: .5rem;
      filter: blur(0rem);
      color: #fff;
    }
  }
</style>